Harvester-adjusting mechanism.



G. A. FARRALL & C. MAUL.

HARVESTER ADJUSTING MECHANISM.

- APPLICATION FILED JUNE 9. 1914.

Patentedsept 12,1916.

INVENTURE @47 4 d/QAM IHTTEIRNEYEI UNITED STATES PATENT OFFICE.

GEORGE A. FARRALL AND CHRISTIAN MAUL, OF BATAVIA, NEW YORK, ASSIGNORS TO THE JOHNSTON I-IARVESTER COMPANY, OF BATAVIA, NEW YORK, A CORPORATION OF NEW YORK.

HARVESTER-ADJUSTING MECHANISM.

Specification of Letters Patent.

Patented Sept. 12, 1916.

Application filed June 9, 1914. Serial No. 843,958.

To all wlwm it may concern Be it known that we, Gnonon A. FARRALL and CHRISTIAN MAUL, citizens of the United States, residing at Bat-avia, in the county of Genesee and State of New York, have invented new and useful Improvements in Harvester-Adjusting Mechanism, of which the following is a specification.

In harvesters for grain, corn and the like it has been customary heretofore to adjust the grainward side of the frame on the grainward supporting wheel for adapting the machine to the length of the stalks and other conditions by means which consisted essentially of a post arranged on the frame and a rack carrying the supporting wheel and engaging slidingly with the post ona line substantially parallel with the plane of the master wheel. This is objectionable because the supporting wheel would be tipped an undue extent when the frame was lowered considerably and thereby produce an excessive strain on the supporting wheel which would be liable to bend or break the same.

It is the object of this invention to provide means for adjusting the frame relatively to the grainward supporting wheel without disturbing the normal position of the latter and thereby relieve the same from undue strain in all positions of the frame relatively thereto.

In the accompanying drawings: Figure 1 is a fragmentary vertical transverse section of a harvester equipped with our improvement. Fig. 2 is a vertical longitudinal section taken in line 22 Fig. 1. Fig. 3 is a horizontal section taken in line 33, Fig. 1. Fig. 4 is a sectional face view of the cam of the frame adjusting mechanism.

Similar characters of'reference indicate corresponding parts throughout the several news.

Although our improved frame adjusting deyice is capable of use on harvesters of different constructions that shown in the drawings, for example, comprises a main frame 1, an upright platform 2 which is arranged on the frame and along which the stalks are carried rearwardly from a cutter mechanism at the front of the machine to a binder mechanism at the rear end of the same, a driving or master wheel 3 of large diameter which supports the frame on the stubbleward side thereof and which forms part of the means for driving the working parts of the machine, and a wheel 4 of com paratively small diameter which supports the frame on the grainward side thereof.

The grainward side of the frame is connected with the grain wheel for raising and lowering the frame by the adjusting mechanism which contains our invention and which is constructed as follows: 5 represents a post mounted. on the grainward side of the frame and provided on its outer side with a curved bearing face 6. 7 represents a rack which is provided on its outer side with a laterally projecting axle arm 8 on which the grain wheel is pivoted while its inner side is provided with a curved bearing face 9 which engages with the corresponding face of said post. Upon raising and lowering the frame these two curved faces slide one past the other and during this movement the same are retained in engagement by any suitable means, for instance,

by two curved guide grooves, 10, 10 arranged at opposite upright edges of the post and receiving curved guide flanges 11, 11 at opposite upright edges of the grain wheel rack, as shown in Figs. 2 and 3.

The are of the cooperating curved bearing faces is arranged in a vertical plane and has its axis or center at the lowermost part of the master or driving wheel where the same rests on the ground and preferably at the inner edge of the lowermost part of the tire of this wheel, as indicated at 12. It follows from this construction that when the frame is raised or lowered on its grainward side relatively to the grain wheel the frame and master wheel will turn in a vertical plane on the lower inner corner 12 of the tire or rim of this wheel and the grainward side of the frame will slide with its curved post on the curved rack of. the grain wheel without however tipping the latter out of its nor mal position either in the elevated or the depressed position of the grainward side of the frame. Straining or springing of the grain wheel, especially in the lowermost position of the grainward side of the frame, is therefore avoided and the machine saved from undue wear.

Any suitable means may be employed for moving the post of the frame up and down ranged on one of the guide flanges of the rack, and an adjusting shaft 14 journaled in an inclined bearing 15 on one side of the grain wheel post and provided with an oblique snail cam 16 which engages with the teeth of the gear rack, as shown in Figs. 2 and 1.

Our improved adjusting mechanism accomplishes the purpose which is sought in a manner which is simple, durable and efficient and without any increase in the cost of manufacture over the means heretofore employed for this purpose.

Ne claim as our invention:

1. A harvester comprising a main frame, a master wheel pivotally mounted on one side of said frame and supporting the latter on the ground, a supporting wheel arranged on the opposite side of said frame, and a vertically oscillating connection be tween said frame and supporting wheel having its axis at the lowermost part of said master wheel.

:2. A harvester comprising a frame adapted to support a cutter mechanism, a plat form and a binder mechanism, a master wheel pivotally mounted on one side of the main frame and resting on the ground, a supporting wheel of smaller diameter than said master wheel arranged on the opposite side of the main frame and resting on the ground, an axle which pivotally supports said supporting wheel, and a vertically oscillating connection between said axle and main frame comprising a post arranged on said frame and having a curved face, a slide carrying said axle and having a curved face engaging the face of said post, and an adjusting device interposed between said post and slide, the axis of the cooperating curved surfaces of said post and slide being arranged horizontally and lengthwise of the machine and at that part of the master wheel resting on the ground.

lVitness our hands this 29th day of May, 1914'.

GEORGE A. FARRALL. CHRISTIAN MAUL.

\Vitnesses LEWIS D. COLLINS, WVILLIs R. Mann.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

